Intelligent pipeline pressure buffering device

Abstract

The invention relates to the technical field of pipeline pressure buffering, and discloses an intelligent pipeline pressure buffering device which comprises a buffering tank, a main pipe body and a one-way liquid inlet piece. A vertically arranged connecting pipe is fixed in the buffer tank, and the one-way liquid inlet piece is connected between the main pipe body and the connecting pipe; a state monitoring piece for monitoring the liquid level and the pressure in the buffer tank is mounted in the buffer tank; a gas supply pressure stabilizing piece for conveying gas into the buffer tank to pressurize so as to control the liquid level height is mounted on the side surface of the buffer tank; the bottom of the buffer tank is connected with a discharging piece, and a mechanical interlocking piece is connected between the air supply pressure stabilizing piece and the discharging piece. Under the high-pressure working condition, through real-time linkage of the state monitoring piece and the air supply pressure stabilizing piece, active pressure supplementing and liquid level stabilizing are conducted on the buffer tank, pressure fluctuation of a main pipe is restrained, backflow prevention is conducted through a hydraulic control one-way valve, emission by mistake during pressure supplementing is eradicated through mechanical interlocking, residues are thoroughly discharged through the purging piece, and high-pressure safe buffering is achieved.

Description

Technical Field

[0001] This invention relates to the field of pipeline pressure buffering technology, and more particularly to an intelligent pipeline pressure buffering device. Background Technology

[0002] In industrial systems involving hazardous or special media such as flammable, explosive, highly toxic, high-temperature, high-pressure, or highly corrosive substances, media transport pipelines are the core channels connecting process equipment and storage facilities, undertaking the crucial function of stably transmitting various materials under different operating conditions. However, due to the complex physicochemical properties of the media and the susceptibility of the transport flow rate to changes in upstream operating conditions or fluctuations in downstream demand, pipeline systems often face problems such as pressure pulsation, water hammer effect, or instantaneous flow shock during operation. These unstable factors can cause local stress concentration and vibration fatigue at pipe bends, valves, flange connections, and interfaces between dynamic and static equipment. Under long-term action, this may lead to sealing failure, loose connections, or even pipeline rupture, resulting in media leakage or serious safety accidents. Therefore, buffer devices are usually configured in pipeline systems to buffer pressure fluctuations caused by the media in the pipeline, reduce the impact on components along the pipeline path, and protect the components.

[0003] However, most existing pressure buffering devices use atmospheric pressure gas as the buffer medium. When applied to high-pressure conditions, the initial pressure of the gas chamber is much lower than the system working pressure. During the buffering process, the gas compression ratio increases sharply, causing drastic changes in the buffer volume. The pressure attenuation capacity decreases significantly, and the stability of the buffering effect decreases significantly and becomes unstable with fluctuations in the working conditions. This makes it difficult to meet the requirements of high-pressure hazardous medium transportation systems for pressure fluctuation suppression.

[0004] To address the aforementioned problems, this application proposes an intelligent pipeline pressure buffer device. Summary of the Invention

[0005] This invention proposes an intelligent pipeline pressure buffer device, which solves the problem that existing pressure buffer devices in related technologies use atmospheric pressure gas as the medium. Under high pressure conditions, the initial pressure of the gas chamber is too low, resulting in an excessively high compression ratio, drastic changes in buffer volume, a significant decrease in buffering effect, and instability, making it difficult to meet the requirements of high-pressure systems for pressure fluctuation suppression.

[0006] The present invention proposes an intelligent pipeline pressure buffer device, comprising a buffer tank, a main pipe and a one-way liquid inlet;

[0007] The buffer tank is fixed with a vertically arranged connecting pipe, and the one-way liquid inlet is connected between the main body and the connecting pipe.

[0008] The buffer tank is equipped with a status monitoring device to monitor the liquid level and pressure inside.

[0009] The buffer tank is equipped with a gas supply and pressure stabilizing device on its side for supplying gas to pressurize it and control the liquid level.

[0010] The bottom of the buffer tank is connected to a drain component, and a mechanical interlock is connected between the gas supply and pressure stabilizing component and the drain component. The mechanical interlock has a first state and a second state. In the first state, the drain component is closed and locked, and the gas supply and pressure stabilizing component is switched to the open state. In the second state, the gas supply and pressure stabilizing component is closed and locked, and the drain component is switched to the open state.

[0011] As a further optimization of the present invention, the one-way liquid inlet component includes a guide tube, the two ends of which are respectively connected to the main body and the connecting tube, and a hydraulic control one-way valve, an electric liquid inlet shut-off valve and a manual liquid inlet shut-off valve are installed sequentially along the path of the guide tube.

[0012] As a further optimization of the present invention, the status monitoring device includes a float magnetostrictive level gauge, a pressure transmitter, and a level alarm switch. The float magnetostrictive level gauge is vertically installed inside the buffer tank, the pressure transmitter is installed at the top inside the buffer tank for monitoring its internal pressure, and the level alarm switch is installed on the inner wall of the buffer tank.

[0013] As a further optimization of the present invention, the air supply and pressure stabilizing component includes an air inlet pipe, an air inlet check valve, an air inlet electric shut-off valve, an air inlet manual shut-off valve, an air supply pipe, and a booster pump. An air inlet pipe communicating with the interior of the buffer tank is connected to the upper part of one side. An air inlet check valve, an air inlet electric shut-off valve, and an air inlet manual shut-off valve are connected to the air inlet pipe in sequence. The air supply pipe is connected to the air inlet manual shut-off valve, and the booster pump is connected to the air supply pipe.

[0014] As a further optimization of the present invention, the discharge component includes a discharge pipe, the bottom of the buffer tank is connected to the discharge pipe communicating with its interior, and an electric discharge shut-off valve and a manual discharge shut-off valve are sequentially connected to the discharge pipe.

[0015] As a further optimization of the present invention, the mechanical interlock component includes a main rod, a first locking rod, and a second locking rod. The two ends of the main rod are respectively hinged with the first locking rod and the second locking rod. The end of the first locking rod away from the main rod is connected to the valve stem end of the intake electric shut-off valve, and the end of the second locking rod away from the main rod is connected to the valve stem end of the discharge electric shut-off valve.

[0016] As a further optimization of the present invention, the top of the buffer tank is connected to a purging device for blowing protective gas into it.

[0017] As a further optimization of the present invention, the purging component includes a purging pipe, the top of the buffer tank is connected to the purging pipe communicating with its interior, and a purging check valve, a purging electric shut-off valve and a purging manual shut-off valve are connected sequentially along the path of the purging pipe.

[0018] The above-described technical solution of the present invention has the following beneficial technical effects:

[0019] 1. During operation, the electric and manual inlet shut-off valves in the one-way inlet device are normally open. The medium flows through the main pipe under high pressure. Some medium will flow upwards through the guide pipe in the one-way inlet device into the connecting pipe, and then through the connecting pipe into the buffer tank to maintain the pressure balance of the medium in the main pipe and prevent significant pressure fluctuations caused by sudden increases in pressure. During operation, the status monitoring device in the buffer tank can monitor its internal pressure and the liquid level in real time. When the pressure in the buffer tank is insufficient, sufficient gas can be supplied to maintain the pressure in the buffer tank through the gas supply and pressure stabilizing device, thus playing a real-time pressure replenishment role. The pressurization operation can control the height of the medium liquid level in the buffer tank, thereby balancing the pressure fluctuations of the medium in the main pipe. Through real-time pressurization, it can be applied to the transportation of media under different working conditions, playing an effective buffering role during the transportation process. The above design, through the cooperation of the condition monitoring device and the gas supply pressure stabilizing device, realizes real-time monitoring and active compensation of the pressure and liquid level in the buffer tank, ensuring that the gas pressure in the buffer tank can always be maintained at a level close to the system working pressure. It fundamentally solves the problems of excessive compression ratio, unstable buffer volume, and sudden drop in attenuation capacity of traditional atmospheric pressure gas buffers under high pressure conditions, and improves the stability of pressure fluctuation suppression effect and adaptability to different high pressure conditions.

[0020] 2. When the pressure in the main pipe is insufficient, the medium flowing inside cannot enter the connecting pipe through the one-way inlet. At this time, the hydraulic control check valve in the one-way inlet can effectively prevent the backflow of the medium in the buffer tank, ensuring the one-way flow of the medium. When the system pressure drops, it can automatically isolate the buffer tank from the main pipe, preventing the medium or pressurized gas stored in the buffer tank from flowing back into the main pipeline. This protects the pressure stability in the main pipe and avoids the failure of the buffer function, thus improving the safety of the entire buffer device.

[0021] 3. To prevent accidental opening of the drain valve at the bottom of the buffer tank during gas replenishment, when the inlet electric shut-off valve in the gas supply regulator is opened, its valve stem drives the mechanical interlock to switch from the second state to the first state. This locks the drain electric shut-off valve in the drain device in the closed state, ensuring that the drain device is shut off simultaneously when the gas supply regulator is pre-operated. The above design, through the valve stem of the inlet electric shut-off valve driving the mechanical interlock, achieves a forced mechanical interlock between the gas supply regulator and the drain device. This design effectively prevents high-pressure gas or medium leakage accidents caused by accidental opening of the drain device when pressurizing the buffer tank, enhancing the safety and error prevention capabilities of the system under high-pressure and hazardous media conditions.

[0022] 4. When it is necessary to discharge the medium in the buffer tank or to perform maintenance on the buffer tank, the inlet electric shut-off valve in the gas supply regulator is closed. When closed, the valve stem end of the inlet electric shut-off valve drives the mechanical interlock to switch from the first state to the second state, and the valve stem end of the inlet electric shut-off valve is locked. The discharge electric shut-off valve in the discharge device is in the open state, and some toxic media in the buffer tank can be discharged from the discharge device. In order to ensure that the medium in the buffer tank can be completely emptied, the purging device at the top of the buffer tank is connected to the protection equipment. The protective gas is transported into the buffer tank along the purging device, pushing some residual harmful gases and media in the buffer tank to be discharged in one go through the discharge device. The above design can ensure that the toxic and harmful media in the buffer tank are completely and safely replaced and discharged, creating safe conditions for subsequent maintenance and avoiding the risk of environmental pollution or personal injury caused by residual media. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of an intelligent pipeline pressure buffer device proposed in this invention.

[0024] Figure 2 This is a schematic diagram of the unidirectional liquid inlet component in this invention;

[0025] Figure 3 This is a schematic diagram of the cooperative structure between the buffer tank and the condition monitoring component in this invention;

[0026] Figure 4 This is a schematic diagram of the structure of the gas supply and pressure stabilizing component, the discharge component, and the mechanical interlock component in this invention;

[0027] Figure 5 This is a schematic diagram of the purging component in this invention.

[0028] Attached reference numerals: 1. Buffer tank; 101. Connecting pipe; 2. Main body; 3. One-way liquid inlet; 31. Conductor pipe; 32. Hydraulic one-way valve; 33. Electric liquid inlet shut-off valve; 34. Manual liquid inlet shut-off valve; 4. Status monitoring device; 41. Float magnetostrictive level gauge; 42. Pressure transmitter; 43. Level alarm switch; 5. Gas supply pressure regulator; 51. Air inlet pipe; 52. Air inlet check valve; 53. Electric air inlet valve. 54. Manual shut-off valve for air intake; 55. Air supply pipe; 56. Booster air pump; 6. Discharge component; 61. Discharge pipe; 62. Electric shut-off valve for discharge; 63. Manual shut-off valve for discharge; 7. Mechanical interlock component; 71. Main rod; 72. First locking rod; 73. Second locking rod; 8. Purge component; 81. Purge pipe; 82. Purge check valve; 83. Electric shut-off valve for purge; 84. Manual shut-off valve for purge. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and the accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0030] like Figure 1-5 As shown, the present invention proposes an intelligent pipeline pressure buffer device, which includes a buffer tank 1, a main pipe 2 and a one-way liquid inlet 3.

[0031] A vertically arranged connecting pipe 101 is fixed inside the buffer tank 1, and a one-way liquid inlet 3 is connected between the main body 2 and the connecting pipe 101.

[0032] The buffer tank 1 is equipped with a status monitoring device 4 that monitors the liquid level and pressure inside;

[0033] A gas supply and pressure stabilizing device 5 is installed on the side of the buffer tank 1 to pressurize the liquid level by supplying gas into it.

[0034] The bottom of the buffer tank 1 is connected to a drain component 6, and a mechanical interlock component 7 is connected between the gas supply and pressure stabilizing component 5 and the drain component 6. The mechanical interlock component 7 has a first state and a second state. In the first state, the drain component 6 is closed and locked, and the gas supply and pressure stabilizing component 5 is switched to the open state. In the second state, the gas supply and pressure stabilizing component 5 is closed and locked, and the drain component 6 is switched to the open state.

[0035] During operation, the high-pressure medium flows in the main pipe 2. Part of the high-pressure medium in the main pipe 2 enters the buffer tank 1 through the one-way liquid inlet 3 and the connecting pipe 101. The space in the buffer tank 1 is used to achieve pressure buffering and avoid a sudden increase in pressure in the main pipe 2. The status monitoring device 4 captures the liquid level and pressure data in the buffer tank 1 in real time to provide a basis for subsequent control. When insufficient pressure or abnormal liquid level is detected, the gas supply and pressure stabilizing device 5 is activated to supply gas to the buffer tank 1 to pressurize it. The gas pressure is used to balance the medium pressure, control the liquid level, and ensure stable buffering effect.

[0036] It should be noted that when gas needs to be supplied to the buffer tank 1 for pressurization through the gas supply regulator 5, in order to prevent the discharge device 6 from opening and causing accidental activation, when the gas supply regulator 5 is in the open state, the mechanical interlock device 7 switches to the first state and locks the discharge device 6 in the closed state to prevent safety accidents caused by misoperation.

[0037] In this embodiment, the one-way liquid inlet component 3 includes a guide pipe 31, with its two ends connected to the main body 2 and the connecting pipe 101, respectively. A hydraulically controlled one-way valve 32, an electric liquid inlet shut-off valve 33, and a manual liquid inlet shut-off valve 34 are sequentially installed along the path of the guide pipe 31. During normal operation, the electric liquid inlet shut-off valve 33 and the manual liquid inlet shut-off valve 34 are normally open, ensuring smooth flow of the medium into the buffer tank 1 and achieving pressure buffering. The manual liquid inlet shut-off valve 34 can be manually closed in case of malfunction or maintenance of the electric liquid inlet shut-off valve 33, improving the ease of device maintenance. The hydraulically controlled one-way valve 32 is an anti-backflow component, primarily based on the medium pressure difference. When the pressure inside the main body 2 is higher than that in the buffer tank 1, the hydraulically controlled one-way valve 32 automatically opens to allow the medium to flow in. When the pressure inside the main body 2 drops to a preset threshold, the valve automatically closes, preventing the medium and high-pressure gas in the buffer tank 1 from flowing back to the main body 2, thus avoiding system pressure fluctuations, equipment damage, and the risk of medium leakage in the main body 2, and improving the safety of device operation.

[0038] In this embodiment, the status monitoring device 4 includes a float magnetostrictive level gauge 41, a pressure transmitter 42, and a level alarm switch 43. The float magnetostrictive level gauge 41 is vertically installed inside the buffer tank 1. The pressure transmitter 42 is installed at the top inside the buffer tank 1 for monitoring its internal pressure. The level alarm switch 43 is installed on the inner wall of the buffer tank 1.

[0039] The float magnetostrictive level gauge 41 utilizes the mechanical movement of the float rising and falling with the liquid level, combined with the magnetostrictive principle, to convert liquid level changes into electrical signals, enabling continuous liquid level measurement. This provides data support for the gas supply pressure stabilizing component 5 to regulate the liquid level height, preventing excessively high or low liquid levels from affecting the buffering effect. The pressure transmitter 42 mainly converts the gas pressure inside the buffer tank 1 into a standard electrical signal for real-time output, capturing pressure fluctuations. When the pressure is lower than the set threshold, it triggers the gas supply pressure stabilizing component 5 to start pressurization, ensuring that the pressure inside the buffer tank 1 is always maintained at a level close to the system's working pressure, guaranteeing a stable buffering effect. The liquid level alarm switch 43 is installed at a specific location on the inner wall of the tank. When the liquid level abnormally rises or falls to a critical value, the switch triggers an alarm signal, promptly reminding personnel to troubleshoot the fault and preventing buffer failure or safety accidents due to uncontrolled liquid level. This provides real-time early warning protection for the operation of the device and improves the timeliness of system maintenance.

[0040] In this embodiment, the air supply and pressure stabilizing component 5 includes an air inlet pipe 51, an air inlet check valve 52, an air inlet electric shut-off valve 53, an air inlet manual shut-off valve 54, an air supply pipe 55, and a booster pump 56. The upper part of one side of the buffer tank 1 is connected to the air inlet pipe 51, which communicates with the interior of the tank. The air inlet pipe 51 is connected to the air inlet check valve 52, the air inlet electric shut-off valve 53, and the air inlet manual shut-off valve 54 arranged in sequence. The air supply pipe 55 is connected to the air inlet manual shut-off valve 54, and the booster pump 56 is connected to the air supply pipe 55.

[0041] When the pressure inside the buffer tank 1 is insufficient, the electric shut-off valve 53 and the manual shut-off valve 54 are opened, and the booster pump 56 delivers gas to the intake pipe 51 through the supply pipe 55. The gas enters the buffer tank 1 through the intake pipe 51, thereby pressurizing the gas inside the buffer tank 1 and regulating the pressure inside the buffer tank 1 to maintain system stability.

[0042] It should be noted that the inlet check valve 52 can prevent gas backflow and ensure that the gas flows unidirectionally to the buffer tank 1.

[0043] In this embodiment, the discharge component 6 includes a discharge pipe 61. The bottom of the buffer tank 1 is connected to the discharge pipe 61, which communicates with its interior. The discharge pipe 61 is connected in sequence to an electric discharge shut-off valve 62 and a manual discharge shut-off valve 63. During normal operation, both the electric discharge shut-off valve 62 and the manual discharge shut-off valve 63 are closed. When it is necessary to discharge the medium or maintain the equipment, the electric discharge shut-off valve 62 is automatically opened according to the control signal to realize automated discharge control. The manual discharge shut-off valve 63 can be used in case of electric valve failure, emergency shutdown, or manual maintenance. It can be manually closed or opened to improve the reliability of the discharge operation. Subsequently, the medium in the buffer tank 1 is discharged through the discharge pipe 61.

[0044] In this embodiment, the mechanical interlock component 7 includes a main rod 71, a first locking rod 72 and a second locking rod 73. The two ends of the main rod 71 are respectively hinged to the first locking rod 72 and the second locking rod 73. The end of the first locking rod 72 away from the main rod 71 is connected to the valve stem end of the intake electric shut-off valve 53, and the end of the second locking rod 73 away from the main rod 71 is connected to the valve stem end of the discharge electric shut-off valve 62.

[0045] When the gas supply pressure regulator 5 starts pressurizing, the valve stem of the inlet electric shut-off valve 53 rotates, driving the first locking rod 72 to move. Through the transmission action of the main rod 71, the second locking rod 73 moves synchronously, locking the valve stem of the discharge electric shut-off valve 62 in the closed position. This achieves the interlock logic that prohibits discharge during pressurization, effectively preventing accidental opening of the discharge electric shut-off valve 62 during pressurization, which could lead to leakage of high-pressure gas and media and avoid safety accidents. When discharge or maintenance is required, the inlet electric shut-off valve 53 closes, and its valve stem resets, driving the first locking rod 72 to move. Through the transmission of the main rod 71, the second locking rod 73 unlocks the discharge electric shut-off valve 62, while the first locking rod 72 locks the valve stem of the inlet electric shut-off valve 53, ensuring that the discharge process is safe and controllable. This eliminates the risk of misoperation from a mechanical structure perspective and improves the safety performance of the device under high-pressure and hazardous media conditions.

[0046] In this embodiment, the top of the buffer tank 1 is connected to a purging component 8 that blows protective gas into it; the purging component 8 includes a purging pipe 81, the top of the buffer tank 1 is connected to the purging pipe 81 that communicates with its interior, and the path of the purging pipe 81 is connected to a purging check valve 82, a purging electric shut-off valve 83 and a purging manual shut-off valve 84 arranged in sequence.

[0047] When it is necessary to discharge the medium in buffer tank 1 or to perform maintenance on buffer tank 1, the electric discharge shut-off valve 62 and the manual discharge shut-off valve 63 can be opened to allow the medium in buffer tank 1 to be discharged through the discharge pipe 61. Then, the electric purging shut-off valve 83 and the manual purging shut-off valve 84 can be opened, and then the purging pipe 81 can be connected to the protective gas supply equipment. The protective gas is delivered to buffer tank 1 through the purging pipe 81, forming a stable airflow in buffer tank 1, which flushes the inner wall and internal space of buffer tank 1. On the one hand, it can completely replace and discharge the toxic, harmful, flammable, and explosive media and gases remaining in buffer tank 1, avoiding personal injury to personnel during maintenance caused by residual media, or safety accidents caused by chemical reactions caused by residual media. On the other hand, after purging, buffer tank 1 is filled with inert protective gas, which can prevent air from entering buffer tank 1 and reacting with residual media, or causing corrosion to the metal parts inside buffer tank 1, thus extending the service life of the device.

[0048] The embodiments of the present invention have been described above, but the embodiments are not limited to the specific implementation methods described above. The specific implementation methods described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the embodiments described above, all of which are within the protection scope of the embodiments described above.

Claims

1. An intelligent pipeline pressure buffer device, characterized in that, It includes a buffer tank (1), a main body (2), and a one-way liquid inlet (3); The buffer tank (1) is fixed with a vertically arranged connecting pipe (101), and the one-way liquid inlet (3) is connected between the main body (2) and the connecting pipe (101); The buffer tank (1) is equipped with a status monitoring device (4) for monitoring the liquid level and pressure inside. The buffer tank (1) is equipped with a gas supply and pressure stabilizing device (5) for supplying gas into it to pressurize it and control the liquid level. The bottom of the buffer tank (1) is connected to a drain (6), and a mechanical interlock (7) is connected between the gas supply and pressure stabilizing component (5) and the drain (6). The mechanical interlock (7) has a first state and a second state. In the first state, the drain (6) is closed and locked, and the gas supply and pressure stabilizing component (5) is switched to the open state. In the second state, the gas supply and pressure stabilizing component (5) is closed and locked, and the drain (6) is switched to the open state.

2. The intelligent pipeline pressure buffer device according to claim 1, characterized in that, The one-way liquid inlet component (3) includes a guide tube (31), the two ends of which are connected to the main body (2) and the connecting tube (101) respectively. A hydraulic control one-way valve (32), an electric liquid inlet shut-off valve (33) and a manual liquid inlet shut-off valve (34) are installed sequentially along the path of the guide tube (31).

3. The intelligent pipeline pressure buffer device according to claim 1, characterized in that, The status monitoring device (4) includes a float magnetostrictive level gauge (41), a pressure transmitter (42), and a level alarm switch (43). The float magnetostrictive level gauge (41) is vertically installed inside the buffer tank (1). The pressure transmitter (42) is installed on the top inside the buffer tank (1) for monitoring its internal pressure. The level alarm switch (43) is installed on the inner wall of the buffer tank (1).

4. The intelligent pipeline pressure buffer device according to claim 1, characterized in that, The gas supply and pressure stabilizing component (5) includes an air inlet pipe (51), an air inlet check valve (52), an air inlet electric shut-off valve (53), an air inlet manual shut-off valve (54), an air supply pipe (55), and a booster pump (56). The upper part of one side of the buffer tank (1) is connected to the air inlet pipe (51) which communicates with its interior. The air inlet pipe (51) is connected to the air inlet check valve (52), the air inlet electric shut-off valve (53), and the air inlet manual shut-off valve (54) arranged in sequence. The air supply pipe (55) is connected to the air inlet manual shut-off valve (54), and the booster pump (56) is connected to the air supply pipe (55).

5. The intelligent pipeline pressure buffer device according to claim 4, characterized in that, The discharge component (6) includes a discharge pipe (61). The bottom of the buffer tank (1) is connected to the discharge pipe (61) which communicates with its interior. The discharge pipe (61) is connected in sequence to an electric discharge shut-off valve (62) and a manual discharge shut-off valve (63).

6. The intelligent pipeline pressure buffer device according to claim 5, characterized in that, The mechanical interlock component (7) includes a main rod (71), a first locking rod (72) and a second locking rod (73). The two ends of the main rod (71) are respectively hinged to the first locking rod (72) and the second locking rod (73). The end of the first locking rod (72) away from the main rod (71) is connected to the valve stem end of the intake electric shut-off valve (53), and the end of the second locking rod (73) away from the main rod (71) is connected to the valve stem end of the discharge electric shut-off valve (62).

7. The intelligent pipeline pressure buffer device according to claim 1, characterized in that, The top of the buffer tank (1) is connected to a purging device (8) that blows protective gas into it.

8. The intelligent pipeline pressure buffer device according to claim 8, characterized in that, The purging component (8) includes a purging pipe (81). The top of the buffer tank (1) is connected to the purging pipe (81) which communicates with its interior. A purging check valve (82), a purging electric shut-off valve (83), and a purging manual shut-off valve (84) are connected sequentially along the path of the purging pipe (81).

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